Roll heater



. 1,619,303 March l 1927' H. E. MccRERY ET AL ROLL HEATER 5 Sheets-Sheet l Filed NOV. 17, 1925 Alonzo 5 Mofzome/ @Hoz um,

y 1,619,303 March 1 1927. H E. CRERY AL 1,619, 03 March l 1927 H, E. MccRERY ET AL 3 ROLL HEATER Filed Nov. 17, 1925 3 Sheets-Sheet 3 Patented Merril, 1927.

UNITED .STATES PATENT oFFICE.

HAROLD E. IQCBERY, ALBERT E. J'SSER, 'ALONZO B; IIONTGOMERY, Ol' A-POLLO, Y PENNSYLVANIA, ASSIGNOBS -TO APOLLO HOLDDTG CORPORATION, OF APOLLO, PENNSYLVANIA, A CORPORATION OF DELAWARE. i

BOLL muy..

' appunti@ mea november 1v, 1925. serial mi. 69,111.

This invention relates to roll heaters and found, however, that the rolls do not operate.

effectively unless properly heated and accordingly the sheets initially passed between 'the rolls to heatthem are imperfect and must be scrapped. Heating the rolls in this manner is very ineilicient and costly due to the large number of sheets which it is necessaiily to pass between the rolls before they are su ciently heated.

An important object of the present invention is to provide a heating apparatus adapted to substantially surround the rolls to impart heat thereto whereby cold vrolls may be heated or the previously heated rolls maintained in heated condition until 1t is desired to use them again. l

A still further object iso provide an yapparatus of the above mentioned character which is adapted to heat the rolls gradually and evenly without causing undue expan# sion of the surface portions thereof, thus preventin the cracking of the rolls.

A still urther object is-to provide an apparatus of the above mentioned character whichis articularly adapted to employ gas burners fbr supplying heat to the rolls, and to provide means for effectively controlling the distribution of the heat to provide an efficient heating action.

A still further object is to provide an ap.- paratus for heating rolls com rising a pair of complementary units apted to fit around op osite sides of the roll whereby they may be easily placed in position and removed by the use of overhead cranes or other lifting apparatus. v f

Otherfobjects and advantages of the invention will become apparent during the course of the following descri tion.'

In 'the drawings, we have s own one embodiment of the invention. In this show-v igure 1 is a side elevation 'of of'one of the rolls and a manner.

Fi1gure2 isa section on line 2-2 of Figure A Figure 3 is a fragmentary sectional view portion ofthe heat control means,

Figure 4 is a detail sectional view through one of the end walls of the heating ap aratus, portions ofthe heating distributmg plates and associated elements being shown in elevation,

Figure 5 is a detail sectional view throughl a portion of the end walls, parts being shown m elevation, Figure 6 is a detail view of the damper control means,

'Figure 7 is aI detail sectional view taken longitudinally-through one of the heat distributing plates, and,

Flgure 8 1s a fragmentary sectional view .on line 8-8 of Figure 1.

Referring to the drawings, the numerals 10 and 11 indicate upper and lower rolls adapted to be rotatably supported by trunnions 12 for rolling sheet m'etal in the usual The trunnions are supported in the usual bearings (not shown).

`The apparatus comprisin the present inventi'on includes a pair o com lementary casing sections indicated as a w ole by the numeral 13. Each of the sections 13 is rovided with end walls 14 which have a utting edges 15. The end walls extend throughout the height of the sections 13 and are adapted to be arranged close to the surface of the rollers as indicatedl in Figure 2, each of the end walls being provided with arcuate cut out portions 16 arran ed concentric with the upper and lower ro ls. The abuttin edges 15 of the end walls are inclined as s own in Figure 2 for a purpose to be described. Each section 13 is provided at its upper portion with arcuate walls 17 preferably arranged concentric with the upper roll and spaced a substantial distance tlerefrom. The arcuate portions 17 terminate in outwardly inclined walls 18, as shown in Figure 2, and the walls 18 are connected at their lower ends to horizontal inwardly extending walls 19. The walls 18 may be provided with suitable hooks 20 secured thereto by rivets or the like 21 to fa-v substantially vertical wall 22 which extends outwardly near its lower end as at 23 and then downwardly, substantially vertically as at 24. The walls 18, 22 and 23 are preferably lined with asbestos or similar material 25 to minimize the radiation of heat. The walls 19 and 24 are provided with air openings 26 for a purpose to be described. above the wall 19, each wall 22 is provided with an inwardly and upwardly extendin wall 27, the inner end of whic is turne as at 28 about a longitudinal rod 29 preferably extending between the end walls 14. The rods 29 act as bracing means between the end walls, as will be ap arent, and additional rods 30 are prefera ly connected between the end walls 14 where these walls extend inwardl between the rolls as shown in Figure 2. f desired, the walls 18 and. 22 may be rovided with suitable apertures covered wit glass 31 or other transparent material held 1n position b plates 32. These apertures are provide merely for the purpose of permitting the operator to observe conditions within the heating apparatus, as will be apparent.

' tions is provided with a bottoni wall 33,

and the inner ends 34 of the bottom walls are s aced apart a substantial distance, as cleary shown in Figure 2. The bottom walls 33 extend outwardly beyond the walls 24, as shown at 35. Heating chambers 36 are arran beneath each o the "walls 33, as shown in Fi ures 1 and 3, these heating chambers exten i transversely ofthe ap aratus. An nuiier of the heating chambers 36 may employed, but in the resent instance we have illustrated two o these chambers beneath each ofthe bottom walls 33, and the chambers beneath each wall are preferably arranged in end to end relation with respect to the chambers beneath the other bottom wall. Each of the heating chambers 36 includes an outer wall 37 and an.inner wall 38, the walls 38 being arran d against each other, as shown. The wal 38 extend upwardly beyond the walls. 33, to a int near the lower roll and each wall 38 is provided with an outwardly extending horizontal portion 39. Each heating chamber is further provided with a bottom wall 40 and side walls 41, and the side walls are provided with openings 42 for a pur to be described.

eans are provided for securing thc upper ends of the casing sections together when the device is in operation. One arcuate wall 17 is provided near its top and near the ends thereof with an upwardly extending lug 43 which is adapted to be arranged in an opening in a locking plate 44 secured at its opposite end to the arcuatei wall 17 of the other casing section. Intermediate the plates 44 the adjacent edges of Vtudinal rod 59 which extends through the walls 17 are s aced apart as shown in Figure 2 to provi e a flue for the assage of roducts of combustion from ther urnei's to described.

In sheet rolling mills gas is usually available and accordingly we ploy gas burners as the means r supplying eat to the rolls. As shown in Figure 2, burner tubes 45 are arranged respectivel above each wall 19 inwardly of each wa l` 24, and within each of the burner chambers 36. The burners are provided with burner openings 46 and the burners within the chambers 36 may be provided with spread,

ers 47 arran ed thereover.

Gas may .source of supply to a supply pipe 48 shown 1n Figure 1. This pipe may be connected to a thermostatical y controlled valve 49 of any suitable type and thermostats 5() are adapted to contro the valve 49. It will be obvious that a separate pi 48 and valve 49 is employed for cach o the casing sections, and each of the pi 48 may be connected to the-gas inain a suitable ilexible hose. The thermostats 50 are preferably arranged inwardly of the walls 22 just below the walls 27 as shown in Figure 2. From each valve 49 the gas is supplied to a depending pipe 52 which is conrefer to emsupplied from any suitable l yeis nected vat its lower end toa horizontally extending pipe 53. From the pipe 53 of each casing section, gas may be supplied to the burners within the chambers 36 through vertical pipes 54 provided with valves 55. Gas to the other burners maybe supplied through pipes 56 which also may be provided with manually controlled valves 57. It will be noted that each of the burner tubes is arranged adjacent the aii openings 26 and 42 to be supplied with auxiliary air therefrom Oto properly support combustion.

Means are provided` for regulating the heat supplied to the lower roll 1l. A 'plurality of heat directing Aplates 58 are arranged around the lower half of the lower i'oll as shown in Figure 2. Each of the plates 58 is connected at one end to a longitie end walls 14. From the rods 59 each plate extends upwardly and outwardly and has its outer end turned about a rod 60. Each rod 60 extends a slight distance beyond the end of the plate by which it is carried and has its inner end turned backwardly upon the late as shown at 61 to s ace the end of tie' plate from the next a jacent plaie.

Thus it will be apparent that spaces are provided between the adjacent plates 58. The ends of the plates which carry the iod 60 obviously are not positively suppportcd and accordingly are free to move, the plates being pivotally supported bly the rods 59. In order to maintain the p ates in proper position, we provide a pair of chains 62 each of which is secured at -its lower end to one of the horizontal flanges 39. The upper ends of the chains are secured to longitudinal rods 63 which pass through the end walls 14 of the casing sections Yand are pivotally supported thereby. One end of the rod 63 1s provided outwardly of the casing with an operating handle 64 contact ing with a quadrant 65 having apertures 66 therein. The operatng handle 64 is arranged outwardly of the quadrant and is provided Awith a bolt 67 having a rounded inner head adapted to frictionally engage selected openings 66 to maintain the shaft 63 in an vdesired position. Each shaft 63 is provit ed with a damper comprising a pair of plates 68 each of which is turned about the shaft 63 as at 69. The inner ends of the damper plates are spaced apart to permit the upper ends of the chains to be wound about the shafts 63 in a manner to be described.

The operation of the apparatus is as fol lows:

The casing section on the right in Figure 2 is first lowered in position by an overhead crane-or any Suitable means, whereupon the usual easing section is brought into position. lVith the casing section to thev left in Figure 2 swinging from the hooks 20, it

will be apparent that the upper end of the casing will swing inwardly and the lower end outwardly. The casing is lowered until the apertures in the plates 44 engage the lugs 43, whereupon the casing is lowered until it assumes the position shown. Conversely, when it is desired to remove the apparatus, the section to the left is first lifted to release the plates 44 from the lugs 43, and due to the inclination of the abutting edges 15 of the end walls, the section first raised may be readily removed from position. The other section then is removed by lifting the hooks 20 by a crane or other means.

It will be apparent that the apparatus is adapted to heat cold rolls to the proper teniperature, but may be employed just as efficiently for maintaining previously used rolls in heated condition until they are to be used again. YVith the burners inoperation, the

heat generated will affect the ltlierniostats 50 which in turn are adapted to control the valves 49 to regulate the amount of gas supplied to the burners. The manuall controlled valves associated with each iurner may be operated to control the proportion cause undue expansion of the surface thereo t'. It has been 'found that introducing highly heated gases against the surface of a roll will cause rapid expansion thereof which in turn sometimes causes large pieces of the .roll to crack. The products of coinbustion 45 inwardly of the walls 24 tend to rise vertically within the walls 22, mingling with the gases from the lower burners when they approach the dampers 68. Some of the gases will pass outwardly of the chamber plates,y but these members tend to retardthe upward flow of the gases to force some of them through the spaces between the adjacent ends of the plates 58 whereby some of the gases will fiow around the lowerroll in contact therewith. The gases from the burners 45 above the walls 19 lminglewitli the gases from the other burners after they have passed around the lower roll to cause efficient heating of the upper roll. It will be apparent that the addition of the asbestos oi similar material 25 prevents excess radiation of heat from the casino.

The free ends of the plates: 58 are adapted i to be supported by the chains 62 as previoiisly described, and the upper ends of these chains are secured to the shafts 63. If it is found that insufiicient heat is being delivered to the lower roll, the shafts63 may be turned by the operating handle 64 to partially close the s ace between the platesy 68 and the side wals 22. This obviously will retard upward movement of the gases from the lower portion of the casing thus causing an increased flow of the gases between the plates 58 and increasing the heat delivei'ed to the lower roll, the plates 58 bein separated as the damper plates are close The products of combustion pass outwardly from the casing through the space between the upper ends of the arcuate casing walls 17. y

The openings 26 in the walls 19 and 24 are adapted to supply auxiliary air to support combustion of the gases as will be apparent. The spreaders 47 are adapted to spread the gases toward opposite sides of the chambers 36 where they mingle with the air passing through the openings 42 to properly complete combustion. The conditions with? in'the casing may be determined through the windows 31 while the apparatus is in operation.

It is to be understood that the form 'of our invention herewith shown and described is to be taken as a preferred example. of the isov same and that various changes in the shape, size and arrangement of parts may be resorted to without departing from tie spirit of the invention or the scope of the subjoined claims.

le claim:

1. A roll heater comprisinpY a casing adapted to surround a pair of adjacent rolls, said casing havingr substantially closed side walls, and end walls shaped to substantially lit said rolls, heating means arranged in said casing'. and adjustable means for directing heat within said casing from said heating means.

2. i roll heater comprisingr a casini; adapted to surround a pair ot' adjacent rolls, said casing having substantially closed side walls, and end walls adapted to substantially tit said rolls, burnersarranged in said casing, and adjustable means tor controlling the direction of movement of some of the products of combustion troni said burners.

3. A roll heater comprising a casing adapted to surround a pair ot adjacent rolls, said casing.;r having substantially closed side walls, and end walls shaped to substantially Ht the sides ot said rolls. a plurality ot burners arranged in said casing. said burners including a lower burner arranged near the bottom of said easing, and adjustable means for directing at least a portion ot the products of combustion from said lower burner toward one of said rolls.

4. A device constructed in accordance with claim 3 provided with manually controlled means for supplying fuel to said burners, and thermostatie means controlling` the total amount oitE fuel supplied to said burners. y

A roll heater comprising a casing adapted to surround a pair ot adjacent upper and lower rolls` said casinar including substantially closed side walls, and end walls shaped to substantially tit the sides of said rolls, said casing being provided adjacent its upper end with a flue, a heater arranged in each side of said casing; intermediate the top and bottom thereof, a lower heater adapted to heat the lower portion ot said casing. and adjustable means for controlling distribution ot' heat from said lower heater,

G. A device constructed in accordance with claim wherein said adjustable means includes a plurality of movable plates arranged adjacent a, portion of said lower roll.

7. A device constructed in accordance with claim wherein said adjustable means includes a series ot' movable plates surroundine thc lowcr portion of said lower roll` the` upper ends of said series of plates being spaced from the side walls of said casing` and dempers arranged between the upper ends of said series of plates and the side walls of said casing.

8. A roll heater comprising a casing adapted to surround a pair of adjacent upper and lower rolls, said casingV including subs'stantiallyv closed side walls. and end walls shaped to fit the sides ot' said rolls.y said casing being provided adjacel'it its upper end with a tlue` means l'or heating the interior ot' said casing' intermediate the top and bottom thereof on opposite sides of said rolls, lower heating means for heating the interior of the lower portion ot' said casing. and a series of adjacent plates surrounding;` the lower portion ot said lower roll, said plates havingY their adjacent edges relatively movable toward and awa),r `trom cach other.

9. A device constructed in accordance with claim 8 provided with mains t'or adjusting said plates.

l0. A device constructed in accordance with claim 8 wherein the upper ends of said series of plates are spaced from the side walls ot' said casing', means for adjusting said plates, and dampers arranged between the side walls of said casing and the upper ends oi:I said series of plates.

l l. A device constructed in accordance with claim 8 wherein the upper ends of said series of plates are spaced from the side walls ot said casing', dampers arranged between the side walls of said casing and the upper ends ot said series of plates. and means for sin'iultaneously operating` said daiupcrs and said plates to move said dampers toward closed positions as the spaces between the adjacent edges of said plates increase.

l2. A roll heater comjn'isinpr a casing adapted to surround a pair of adjacent upper and lower rolls. said casing including substantially closed side walls, and end Walls shaped to lit the sides of said rolls, said easing being provided adjacent its upper end with a Hue, means tor heat-ingr the interior of said casing intermediate the topand bottom thereof on opposite sides of said rolls, lower heating means for heating the interior ot the lower portion of said casing, a series of horizontally arranged plates surrounding the lower portion of said lower roll, each of said plates being pivotally connected at one horizontal edge to said easing. the opposite edge of each plate being tree and arranged slightly outwardly of the pivoted edge of the next adjacent plate, and means for controlling.;r movement of the free edges of said plates.

13. A device constructed in accordance with claim lf2 wherein said last named means comprises a flexible member passed around said plates and contactingr with the free edges thereof.

ll. A device constructed in accordance with claim 12 wherein said last named means comprises a pair of flexible members each having,T one end lixed outwardlyT of said plates and substantially beneath the center of said lower roll, said flexible members contac'ting with the free edges of said plates, and means for vertically adjusting the free ends of said flexible members.

15. A device constructed in accordance with claim 12 wherein said last named means comprises a pair of flexible members each havlng one end xed outwardl of said plates beneath the center of said `lower roll, said flexible members contacting with the free edges of said plates, and a pair of rotatable shafts arranged in said casing on opposite sides of said lower roll, the opposite ends of said flexible members being secured to said shaft.

16. A roll heater comprising a casing adapted to surround a pairof adjacent upper and lower rolls, said casing including substantially closed side walls, and end walls shaped to fit the sides of said rolls, said casing being provided adjacent its upper end with a. Hue, burners arranged in the lower portion of said casing, a series of horizontally arranged plates surrounding the lower ortion of Said lower roll, each of said plates ing pivotally connected at one horizontal edge'to said casing, the opposite edge of each plate being free and arranged slightly outwardly of the pivoted edge of the next adjaside walls of said casing, a shaft arranged adjacent each upper end of said series of plates, the opposite ends of said flexible membersy being secured to said shaft to be wound thereon, and dampers secured to said shafts.

17. A device constructedA in accordance with claim 16 provided with a pair of heating chambers arranged beneath said casing and communicating therewith, said burners being arranged in said chambers.

In testimony whereof we ax our signatures.

HAROLD E. MCCRERY. ALBERT E. JESSER. ALONZO B. MONTGOMERY. 

